11131( 2) - 04/20/07 10:08 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11131 Version: 2 Check-in Time: 20-Apr-2007 14:07:48 STScI Edit Number: 0 Title Star formation at large radii in cooling flow brightest cluster galaxies ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 16 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Walter Jaffe Sterrewacht Leiden CoI: Dr. Malcolm Bremer University of Bristol N CoI: Dr. Nina Hatch Sterrewacht Leiden N CoI: Mr. Raymond Oonk Sterrewacht Leiden N ------------------------------------------------------------------------------------ Abstract We propose to take deep ACS FUV images of the bright central galaxies in two powerful cooling flow clusters for which we have VLT UBR images, with the object of determining whether the UV excesses we observe at large radii (>15kpc) are caused by young stars, ultrahot (WR) stars, or an as yet unknown source. Current models of excess UV light at the AGN-dominated centers of these galaxies cannot easily be extended to large radii. New understanding of star formation in these clusters will be directly applicable to scenarios of galaxy formation in the early universe. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will observe the central galaxies of 2 clusters: ABELL-2597 (z=0.085) and ABELL-2204 (z=0.152) with ACS SBC in the FUV filter F150LP. We wish to observe the brightest, most extended galaxy in each field. Positional accuracy does not need to be more than 2 arcsec. Each target is observed in 5 orbits, 1 sub- exposure per obit and each offset by ~1.5 arcsec. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11131( 2) - 04/20/07 10:08 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 ABELL-2597 GALAXY, COOLING FLOW, RA=23H25M19.9000S +/- 2", DEC=- J2000 Z = V = 13.0+/-1.0 EMISSION LINE NEBULA 12D07'24.02" +/- 2" 0.085 R-band 11.6mag error~0.5mag Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the NED database. Co-ordinates changed to center on galaxy. The target is extended so positional accuracy needed to be good within 2". 2 ABELL-2204 GALAXY, COOLING FLOW, RA=16H32M46.8820S +/- 2", J2000 Z = V = 14.0+/-0.4 EMISSION LINE NEBULA DEC=+05D34'32.31" +/- 2" 0.152 Rmag=12.2 error=0.4 Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the NED database. Co-ordinates changed to center on galaxy. The target is extended so positional accuracy needed to be good within 2". 3 ABELL-2597- GALAXY, COOLING FLOW, RA=23H25M20.0000S +/- 2", DEC=- J2000 Z = V = 13.0+/-1.0 OFFSET EMISSION LINE NEBULA 12D07'22.32" +/- 2" 0.085 R-band 11.6mag error~0.5mag Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the NED database. Co-ordinates changed to center on galaxy. The target is extended so positional accuracy needed to be good within 2". 4 ABELL-2204- GALAXY, COOLING FLOW, RA=16H32M47.0020S +/- 2", J2000 Z = V = 14.0+/-0.4 OFFSET EMISSION LINE NEBULA DEC=+05D34'33.81" +/- 2" 0.152 Rmag=12.2 error=0.4 Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the NED database. Co-ordinates changed to center on galaxy. The target is extended so positional accuracy needed to be good within 2". 11131( 2) - 04/20/07 10:08 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-SBC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 2.0 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 44.4 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type ACS-SBC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 3.0 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 134.4 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 11131( 2) - 04/20/07 10:08 - [ 4] Visit: 01 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ABELL-2597 ACS/SBC ACCUM SBC F150LP 1 8000 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ ABELL-2597 1 ACS/SBC ACCUM SBC F150LP 1 none none none 1 2701.0 S ABELL-2597 1 ACS/SBC ACCUM SBC F150LP 2 none none none 2 2720.0 S ABELL-2597 1 ACS/SBC ACCUM SBC F150LP 3 none none none 3 2720.0 S 11131( 2) - 04/20/07 10:08 - [ 5] Visit: 02 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ABELL-2597- ACS/SBC ACCUM SBC F150LP 1 3000 S PATTERN 2 1 OFFSET see below ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ ABELL-2597-OFFSET 1 ACS/SBC ACCUM SBC F150LP 1 none none none 1 2701.0 S ABELL-2597-OFFSET 1 ACS/SBC ACCUM SBC F150LP 2 none none none 2 2718.0 S 11131( 2) - 04/20/07 10:08 - [ 6] Visit: 03 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ABELL-2204 ACS/SBC ACCUM SBC F150LP 1 8000 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ ABELL-2204 1 ACS/SBC ACCUM SBC F150LP 1 none none none 1 2696.0 S ABELL-2204 1 ACS/SBC ACCUM SBC F150LP 2 none none none 2 2715.0 S ABELL-2204 1 ACS/SBC ACCUM SBC F150LP 3 none none none 3 2715.0 S 11131( 2) - 04/20/07 10:08 - [ 7] Visit: 04 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ABELL-2204- ACS/SBC ACCUM SBC F150LP 1 4000 S PATTERN 2 1 OFFSET see below ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ ABELL-2204-OFFSET 1 ACS/SBC ACCUM SBC F150LP 1 none none none 1 2696.0 S ABELL-2204-OFFSET 1 ACS/SBC ACCUM SBC F150LP 2 none none none 2 2713.0 S 11131( 2) - 04/20/07 10:08 - [ 8] Summary Form for Proposal 11131 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures SBC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/SBC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1; PATTERN 2 1; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F150LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names ABELL-2597 ABELL-2597-OFFSET ABELL-2204 ABELL-2204-OFFSET ------------------------------------------------------------------------------------------------------------------------------------